But he can use a robot too: a football-sized drone, hovering several metres off the ground, follows a beacon stashed in the little boy's school bag.

但他也可以选择使用机器人：在小男孩的书包里放入一个信标台，足球大小的无人飞机会盘旋在距地面几米高的地方，一直跟着信号。

youdao

But he can use a robot too: a football-sized drone, hovering several metres off the ground, follows a beacon stashed in the little boy's school bag.

但他也可以选择使用机器人：在小男孩的书包里放入一个信标台，足球大小的无人飞机会盘旋在距地面几米高的地方，一直跟着信号。

youdao